CN204167019U - A kind of composite high-voltage bushing - Google Patents

A kind of composite high-voltage bushing Download PDF

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Publication number
CN204167019U
CN204167019U CN201420629035.7U CN201420629035U CN204167019U CN 204167019 U CN204167019 U CN 204167019U CN 201420629035 U CN201420629035 U CN 201420629035U CN 204167019 U CN204167019 U CN 204167019U
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CN
China
Prior art keywords
flange
composite high
voltage bushing
guide rod
insulation structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420629035.7U
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Chinese (zh)
Inventor
刘磊
李海峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHENGDU FENGDA TECHNOLOGY Co Ltd
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CHENGDU FENGDA TECHNOLOGY Co Ltd
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Priority to CN201420629035.7U priority Critical patent/CN204167019U/en
Application granted granted Critical
Publication of CN204167019U publication Critical patent/CN204167019U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of composite high-voltage bushing, this kind of composite high-voltage bushing smears one deck semiconductive silica-gel coating by the sleeve pipe position near the junction and flange of flange and sleeve pipe, because the coating processes of semiconductive silica-gel coating is simple, coating is smoothly fine and close, while guarantee conductivity (conductivity is greater than silicon rubber) can to make flange near and flange is tending towards equipotential, the Electric Field Distribution near flange and flange can be improved, make the dielectric strength of the raising medium of external electrode.

Description

A kind of composite high-voltage bushing
Technical field
The utility model relates to electrical equipment, particularly, relates to a kind of composite high-voltage bushing.
Background technology
Bushing belongs to power station, electric information high-tension insulator.When high-voltage current conductor needs through the technology case shell different from its current potential or wall etc. time, bushing will be used.Bushing mainly plays a part to make lead-in wire contrast insulation and fix.Introduce current-carrying conductor or draw the electric equipment metal shell such as transformer, circuit breaker, capacitor, belong to electrical equipment sleeve pipe; Current-carrying conductor is belonged to power station sleeve pipe through building or wall.
Sleeve pipe is that the center of inserting the electrode of another different potentials by an electrode is formed, so be the insulation system that a kind of typical electric field has strong perpendicular media surface component, dielectric easily punctures; The voltage's distribiuting on its surface is very uneven, very concentrated at the electric field of edge especially near flange of external electrode, is easy to start from here corona and gliding spark discharge occur.The Electric Field Distribution near external electrode must be improved for this reason, improve the dielectric strength of medium.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of composite high-voltage bushing, this kind of composite high-voltage bushing smears one deck semiconductive silica-gel coating by the sleeve pipe position near the junction and flange of flange and sleeve pipe, because the coating processes of semiconductive silica-gel coating is simple, coating is smoothly fine and close, while guarantee conductivity (conductivity is greater than silicon rubber) can to make flange near and flange is tending towards equipotential, the Electric Field Distribution near flange and flange can be improved, make the dielectric strength of the raising medium of external electrode.
The technical scheme in the invention for solving the above technical problem is:
A kind of composite high-voltage bushing, comprise guide rod, interior insulation system, external insulation structure, binding post and metal-ware, described metal-ware is arranged on external insulation structure, the coated interior insulation system of external insulation structure, interior insulation system is coated with guide rod, and guide rod is connected with binding post;
Described interior insulation system is epoxy insulation layer, and external insulation structure is silicone rubber jacket layer, and silicone rubber jacket layer is provided with full skirt;
Described metal-ware comprises radome and flange, and described radome is arranged on binding post and guide rod junction and runs through epoxy resin layer and the external insulation structure of interior insulation system, and described flange is connected with in the middle part of sleeve pipe;
The cover outer tube layer of described sleeve pipe and flange connections and distance flange 3-6cm is provided with semiconductive silica-gel coating.
Thinking of the present utility model is: the field intensity near the flange finding bushing in reality is investigated is very concentrated, be unfavorable for that very much the uniformity of field strength distribution increases along with voltage, be easy near flange produce corona and brush discharge, for preventing the generation of this phenomenon, one deck semiconductive silica-gel coating is smeared at the sleeve pipe position taken near the junction and flange of flange and sleeve pipe, because the coating processes of semiconductive silica-gel coating is simple, coating is smoothly fine and close, while guarantee conductivity (conductivity is greater than silicon rubber) can to make flange near and flange is tending towards equipotential, the Electric Field Distribution near flange and flange can be improved, make the dielectric strength of the raising medium of external electrode, there is certain progressive.
The conductivity of described semiconductive silica-gel coating is 10 7s/m.Conductivity can play the effect of even field strength distribution in suitable scope, if conductivity is too strong, field intensity also can be uneven; Too weak, then and do not have the silicon rubber of added-time as broad as long, the effect of anticipation cannot be played.Calculate by experiment and show, bushing and flange connections coating semiconductor silica-gel coating can make most high field intensity reduce 33.5%, play very large effect to regulating being uniformly distributed of field intensity.
Described semiconductive silica-gel coating thickness is 0.3-0.5mm.The setting of coating layer thickness and conductivity to arrange thinking consistent.
The one-sided insulated lengths of high-voltage wall bushing is limited by the aerial flashover voltage of external insulation, if length is not saturating, will cause air breakdown.Therefore one-sided insulated lengths should select suitable length, generally according to formula: (flashover voltage-14)/3.16 tentatively can obtain the length of insulation system.And for such as 110kV bushing, lightning impulse dry withstand voltage is 550kV, its one-sided insulated lengths is about 16cm.
Described guide rod is copper bar.
The silicone rubber jacket layer of described external insulation structure is the rubber through post vulcanization.Silicon rubber through post vulcanization has good compression, dielectric property and stable mechanical performance, makes full skirt with this, and the performance such as the electrical insulating property of silastic material excellence, resistance to amblent air temperature impact can be made to be not fully exerted.
To sum up, the beneficial effects of the utility model are:
The utility model smears one deck semiconductive silica-gel coating by the sleeve pipe position near the junction and flange of flange and sleeve pipe, because the coating processes of semiconductive silica-gel coating is simple, coating is smoothly fine and close, while guarantee conductivity (conductivity is greater than silicon rubber) can to make flange near and flange is tending towards equipotential, the Electric Field Distribution near flange and flange can be improved, make the dielectric strength of the raising medium of external electrode.
Accompanying drawing explanation
Fig. 1 is structure chart of the present utility model.
Mark and corresponding parts title in accompanying drawing:
1, guide rod, 2, binding post, 3, external insulation structure, 4, radome, 5, interior insulation system, 6, flange, 7, full skirt, 8, semiconductive silica-gel coating.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but execution mode of the present utility model is not limited thereto.
Embodiment 1:
As shown in Figure 1, a kind of composite high-voltage bushing, comprise guide rod 1, interior insulation system 5, external insulation structure 3, binding post 2 and metal-ware, described metal-ware is arranged on external insulation structure 3, the coated interior insulation system 5 of external insulation structure 3, interior insulation system 5 is coated with guide rod 1, and guide rod 1 is connected with binding post 2;
Described interior insulation system 5 is epoxy insulation layer, and external insulation structure 3 is silicone rubber jacket layer, silicone rubber jacket layer is provided with full skirt 7;
Described metal-ware comprises radome 4 and flange 6, and described radome 4 is arranged on binding post 2 and guide rod 1 junction and runs through epoxy resin layer and the external insulation structure 3 of interior insulation system 5, and described flange 6 is connected with in the middle part of sleeve pipe;
The cover outer tube layer of described sleeve pipe and flange 6 junction and distance flange 63-6cm is provided with semiconductive silica-gel coating 8.
Thinking of the present utility model is: the field intensity near the flange 6 finding bushing in reality is investigated is very concentrated, be unfavorable for that very much the uniformity of field strength distribution increases along with voltage, be easy near flange 6 produce corona and brush discharge, for preventing the generation of this phenomenon, one deck semiconductive silica-gel coating 8 is smeared at the sleeve pipe position taken near the junction and flange 6 of flange 6 and sleeve pipe, because the coating processes of semiconductive silica-gel coating 8 is simple, coating is smoothly fine and close, while guarantee conductivity, conductivity is greater than silicon rubber and can makes flange 6 near and flange 6 is tending towards equipotential, the Electric Field Distribution near flange 6 and flange 6 can be improved, make the dielectric strength of the raising medium of external electrode, there is certain progressive.
Embodiment 2:
As shown in Figure 1, and embodiment 1 is similar, and difference is:
The conductivity of described semiconductive silica-gel coating 8 is 10 7s/m.Conductivity can play the effect of even field strength distribution in suitable scope, if conductivity is too strong, field intensity also can be uneven; Too weak, then and do not have the silicon rubber of added-time as broad as long, the effect of anticipation cannot be played.
Described semiconductive silica-gel coating 8 thickness is 0.3-0.5mm.The setting of coating layer thickness and conductivity to arrange thinking consistent.
The one-sided insulated lengths of high-voltage wall bushing is limited by the aerial flashover voltage of external insulation, if length is not saturating, will cause air breakdown.Therefore one-sided insulated lengths should select suitable length, generally according to formula: flashover voltage-14/3.16 tentatively can obtain the length of insulation system.And for such as 110kV bushing, lightning impulse dry withstand voltage is 550kV, its one-sided insulated lengths is about 16cm.
Described guide rod 1 is copper bar.
The silicone rubber jacket layer of described external insulation structure 3 is the rubber through post vulcanization.Silicon rubber through post vulcanization has good compression, dielectric property and stable mechanical performance, makes full skirt 7, the performance such as the electrical insulating property of silastic material excellence, resistance to amblent air temperature impact can be made to be not fully exerted with this.
As mentioned above, the utility model can be realized preferably.

Claims (6)

1. a composite high-voltage bushing, it is characterized in that, comprise guide rod (1), interior insulation system (5), external insulation structure (3), binding post (2) and metal-ware, described metal-ware is arranged on external insulation structure (3), the coated interior insulation system (5) of external insulation structure (3), interior insulation system (5) is coated with guide rod (1), and guide rod (1) is connected with binding post (2);
Described interior insulation system (5) is epoxy insulation layer, and external insulation structure (3) is silicone rubber jacket layer, silicone rubber jacket layer is provided with full skirt (7);
Described metal-ware comprises radome (4) and flange (6), described radome (4) is arranged on binding post (2) and guide rod (1) junction and runs through epoxy resin layer and the external insulation structure (3) of interior insulation system (5), and described flange (6) is connected with in the middle part of sleeve pipe;
The cover outer tube layer of described sleeve pipe and flange (6) junction and distance flange (6) 3-6cm is provided with semiconductive silica-gel coating (8).
2. composite high-voltage bushing according to claim 1, is characterized in that, the conductivity of described semiconductive silica-gel coating (8) is 10 7s/m.
3. composite high-voltage bushing according to claim 1, is characterized in that, described semiconductive silica-gel coating (8) thickness is 0.3-0.5mm.
4. composite high-voltage bushing according to claim 1, is characterized in that, the length of described external insulation structure (3) is 15-20cm.
5. composite high-voltage bushing according to claim 1, is characterized in that, described guide rod (1) is copper bar.
6. composite high-voltage bushing according to claim 1, is characterized in that, the silicone rubber jacket layer of described external insulation structure (3) is the rubber through post vulcanization.
CN201420629035.7U 2014-10-28 2014-10-28 A kind of composite high-voltage bushing Expired - Fee Related CN204167019U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420629035.7U CN204167019U (en) 2014-10-28 2014-10-28 A kind of composite high-voltage bushing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420629035.7U CN204167019U (en) 2014-10-28 2014-10-28 A kind of composite high-voltage bushing

Publications (1)

Publication Number Publication Date
CN204167019U true CN204167019U (en) 2015-02-18

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319034A (en) * 2014-10-28 2015-01-28 成都峰达科技有限公司 Simple composite high-voltage bushing
CN104992793A (en) * 2015-07-08 2015-10-21 清华大学深圳研究生院 Anti-icing insulator device and power transmission line
CN105047065A (en) * 2015-09-07 2015-11-11 国网上海市电力公司 Composite casing pipe assembly for power transmission high-voltage cable joint teaching
CN105119210A (en) * 2015-08-26 2015-12-02 芜湖市凯鑫避雷器有限责任公司 High-voltage wall bushing semiconductor refrigeration device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319034A (en) * 2014-10-28 2015-01-28 成都峰达科技有限公司 Simple composite high-voltage bushing
CN104992793A (en) * 2015-07-08 2015-10-21 清华大学深圳研究生院 Anti-icing insulator device and power transmission line
CN105119210A (en) * 2015-08-26 2015-12-02 芜湖市凯鑫避雷器有限责任公司 High-voltage wall bushing semiconductor refrigeration device
CN105047065A (en) * 2015-09-07 2015-11-11 国网上海市电力公司 Composite casing pipe assembly for power transmission high-voltage cable joint teaching

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150218

Termination date: 20151028

EXPY Termination of patent right or utility model